ELIZABETH, N.J. — Wakefern Food Corp. is actively looking for non-member wholesale customers — an approach that represents “a major change in our mind-set,” according to Joseph S. Colalillo, chairman and chief executive officer of the member-owned cooperative here. ”We’re still focused 100% on our members and their needs, but if the right opportunity [for a wholesale customer] comes along, we won’t say no anymore,” he told SN. “We’ll look at it and see if there are benefits for us.” Wakefern